COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Ye Zhu,Qiong Hu,Wei Wei,Chenglin Yi,Xiaoya Liu
In this study a type of colloidal particles with a cross-linked poly(divinylbenzene) (poly(DVB)) core and a poly(acrylic acid- r -styrene) (PAS) shell were directly prepared by reversible addition-fragmentation chain transfer (RAFT)-mediated cross-linking copolymerization. The particle size, morphology, zeta potential and pH responsibility were studied. The emulsification study showed that PAS-Poly(DVB) colloidal particles were effective particulate emulsifiers when homogenized with various oils including toluene, white oil, isooctyl palmitate, dicaprylyl carbonate, silicone oil, and propylheptyl caprylate. Additionally, the emulsification performance of PAS-Poly(DVB) colloidal particles at different pH values were investigated. Gelled white oil- in -water high internal phase emulsions (HIPEs) were formed at a high oil volume fraction of 80% when the colloidal particles were flocculated at low pH value. The addition of base can trigger the demulsification of the HIPEs, exhibiting a pH-responsive behavior. The effects of oil phase volume fraction on emulsion rheological properties were investigated. Both the emulsion viscosity and storage modulus (G′) progressively increased with the increasing of oil phase volume fraction. These results suggest that our work provides a convenient and feasible way to prepare effective particulate emulsifiers via the direct chemical reaction, and the PAS-Poly(DVB) colloidal particles have promising potential application in the oil industry and preparation and exploitation of smart materials.
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 9
·2020-2030
·
IF 2.578
Shijun Long,Di Qiu,Ren Long,Xun Li,Hanyu Chen,Yiwan Huang,Xuefeng Li
In order to improve the performance of inorganic/organic composites, aluminum trihydroxide (ATH) core composites with a styrene-ethylene-butadiene-styrene block copolymer grafted with maleic anhydride (MAH- g -SEBS) shell phase, and P-N flame retardant as a synergistic agent, were prepared through an interface design. The effects of polyethylene glycol (PEG) content on the interfacial interaction, flame retardancy, thermal properties, and mechanical properties of high-density polyethylene (HDPE)/ATH composites were investigated by small angle X-ray diffraction, rotational rheometer, limiting oxygen index, thermogravimetric analysis (TGA), and tensile testing. The ATH synergistic effects of P-N flame-retardant improved the combustion performance of HDPE/ATH/PEG(3%)/MAH- g -SEBS/P-N (abbreviated as HDPE/MH3/M- g -S/P-N) composite by forming more carbon layer, increased the elongation at break from 21% to 558% compared to HDPE/ATH, and increased the interface thickness from 0.447 to 0.891 nm. SEM results support the compatibility of ATH with HDPE increased and the interfacial effect was enhanced. TGA showed the maximum decomposition temperature of the two stages and the yield of the residue at high temperature increased first and then decreased with the increase of PEG content. Rheological behavior showed the storage modulus, complex viscosity, and the relaxation time initially increased and then decreased with the increase of PEG content indicating PEG, M- g -S, and ATH powder gradually formed a partial coating, then a full coating, and finally an over-coated core-shell structured model.
✓ 已验证
DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2017
·Vol. 119
·期 12
·1700243
·
IF 2.145
Wenlu Zuo,Xuechao Hu,Yaqiong Yang,Ling Jiang,Lujing Ren,He Huang
p -Anisidine value (AV) is an important and commonly used index to determine the second oxidation statue of edible oils, but it sometimes cannot reflect the concentrations of all the secondary products, such as saturated aldehydes. An improved method for the determination of saturated aliphatic aldehydes (SAA) in docosahexaenoic acid (DHA)-rich oils is developed in this study. This method reduces the aldehyde 2,4-dinitrophenylhydrazone adducts (DNPhydrazones) using 2-picoline borane, which can eliminate the analytical error caused by the isomerism of DNPhydrazone derivatives. The changes of SAA content during the oxidation of DHA-rich oil is subsequently monitored. Acetaldehyde (168.8 µmol kg −1 ) and propionaldehyde (78.5 µmol kg −1 ) are the two main SAAs in fresh oil, and their concentrations increase to 824.8–811.9 µmol kg −1 , respectively, after oxidation for 50 h at 80 °C. Furthermore, a Michael addition reaction is found to significantly reduce the AV of oxidized oils, from 172.5 to 11.7. Moreover, the concentration of SAAs shows no significant difference and could clearly identify the low-quality oil. These results demonstrate that SAA content might be a potential index to identify oxidized oils, which could provide a good supplementary value to the traditional AV index. Practical Applications : The method that has been developed in this study makes it possible to quantify saturated aliphatic aldehydes as markers of oxidation of oils, especially when the panisidine value (AV) cannot correctly assess the levels of secondary products. It could serve as a supplement to the AV index and could be applied to oils, fats, and food products. This work provides quantitative data regarding the amounts of saturated aliphatic aldehydes that can be present in DHA-rich oils during the oxidation process. An improved method for determinig saturated aliphatic aldehydes (SAA) in docosahexaenoic acid (DHA)-rich oils is developed. The changes of SAA content during the oxidation of DHA-rich oil is monitored. Furthermore, a Michael addition reaction is found to significantly reduce the AV of oxidized oils, from 172.5 to 11.7. The concentration of SAAs does not display significant differences and can clearly identify the low-quality oil. These results demonstrate that the SAA content might be a potential index to identify oxidized oils, which could serve as a good supplement to the AV index.
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Zichun Xiao,Ya-Nan Zhou,Xiaowei Wang,Jiawu Cui,Mingyu Yang,Chengyong Shu,Duzhao Han,Jiangqi Zhou,Chengxin Peng,Wei Tang,Yuping Wu
Lithium metal is considered as the ultimate anode for next-generation high energy-density batteries. However, its practical application is still severely hindered by Li dendrite growth as well as infinite volume variation along plating and stripping. Herein, we report a dual-layered, spatially ordered composite skeleton for bottom-up lithium growth by uniformly incorporating Li6.06La3Zr2Al0.2O12 (LLZO) in the upper layer and ZnO in the bottom layer, respectively, in the matrix of carbon fibers (CFs). The well-dispersed ZnO nanoparticles on CFs in the bottom layer function as lithiophilic nucleation sites to homogenize Li nucleation, while LLZO nanoparticles on CFs in the upper layer facilitate Li ion diffusion and distribution for stable lithium growth owing to the high ion conductivity of LLZO. Benefiting from this synergetic effect, the CFs@LLZO//CFs@ZnO composite skeleton can effectively induce Li plating/stripping in a controllable spatially ordered manner, suppressing the volume variation and inhibiting the formation of dendritic lithium. As a result, the symmetric cell using Li|CFs@LLZO//CFs@ZnO||CFs@LLZO//CFs@ZnO|Li presents good cycling stability over 2500 h with a small overpotential of 12 mV at 1 mA cm–2. Notably, under a harsh negative-to-positive N/P ratio of 1, the Li|CFs@LLZO//CFs@ZnO||NCM811 full cell delivers a lifespan of 100 cycles with a capacity fading of only 0.175% per cycle and an average CE of 99.3%.
✓ 已验证
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Zhuoyuan Zheng,Xudong Zhang,Wenhui Shi,Shishuo Liang,Haichuan Cao,Yanling Fu,Hongwei Wang,Yusong Zhu
Although sodium metal batteries (SMBs) have drawn numerous attentions as the promising candidate for the next-generation rechargeable batteries, various issues hinder their practical applications, e.g., the growth of dendrites and large volume change of Na metal during cycling, etc.. The adoption of gel polymer electrolyte (GPE) is an effective solution to address the safety issues and increase the lifetime of SMBs. In this study, a novel composite membrane consisting of nonwoven fabric as the supporting matrix and poly (vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) as the Na + transmission medium is easily fabricated via non-solvent induced phase inversion method. After plasticized by NaClO 4 -based liquid electrolyte , the obtained composite membrane exhibits an enhanced mechanical strength , high uptake to organic liquid electrolyte (115%), high thermal and electrochemical stability, superior ionic conductivity (1.38 mS cm −1 ) and remarkable Na ion transference number (0.47), which has been demonstrated to effectively suppress the growth of sodium dendrite, improve the fast-charging performance and cycling stability of the corresponding SMBs. This work paves a way for the commercialization of GPE in the fast-charging SMBs.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Hong-Yan Lü,Xiao-Hua Zhang,Fang Wan,Dao-Sheng Liu,Chao-Ying Fan,Huan-Mei Xu,Guang Wang,Xing-Long Wu
In this work, a flexible and self-supporting P-doped carbon cloth (FPCC), which is composed of interwoven mesh of hollow microtubules with porous carbon walls, is prepared via a vacuum-sealed doping technology by employing the commercially available cotton cloth as sustainable and scalable raw material. When directly used as binder-free anode for sodium-ion batteries, the as-prepared FPCC delivers superior Na-storage properties in terms of specific capacity up to 242.4 mA h g–1, high initial Coulombic efficiency of ∼72%, excellent rate capabilities (e.g., 123.1 mA h g–1 at a high current of 1 A g–1), and long-term cycle life (e.g., ∼88% capacity retention after even 600 cycles). All these electrochemical data are better than the undoped carbon cloth control, demonstrating the significance of P-doping to enhance the Na-storage properties of cotton-derived carbon anode. Furthermore, the technologies of electrochemical impedance spectroscopy and galvanostatic intermittent titration technique are implemented to disclose the decrease of charge transfer resistance and improvement of Na-migration kinetics, respectively.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2021
·Vol. 39
·期 8
·975-983
·
IF 3.603
Li Hui-Xian,Hou Lei,Wu Pei-Yi
The time-resolved attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy is employed to investigate the transport mechanism of gel electrolytes by monitoring the diffusion behavior of propylene carbonate-lithium bis(trifluoromethylsulfonyl)imide (PC-LiTFSI) solution through poly(vinylidene fluoride- co -hexafluoropropylene) (P(VDF-HFP)) films. Fickian behavior has been observed for both TFSI − and PC. Higher temperature leads to faster diffusion of TFSI − and PC, which could be related to the increased free volume in P(VDF-HFP) matrix and rapid molecular movements upon heating. Various molecular interactions among LiTFSI, PC and P(VDF-HFP) have been recognized. During the diffusion process, PC molecules, in the form of small clusters, can firstly diffuse through the P(VDF-HFP) film and interact with P(VDF-HFP) by dipole-dipole interaction, acting as the plasticizer. Then, Li + diffuses into P(VDF-HFP) with the help of ion-dipole interactions between Li + and C-O of PC. Meanwhile, TFSI − diffuses through the polymer matrix in solvation states. In addition, slight ion-dipole interactions between Li + and P(VDF-HFP) have been observed as well. Results in this work contribute to a better understanding of transport process in gel polymer electrolytes for lithium-ion batteries and support the development of improved gel polymer electrolytes by rationally regulating molecular interactions.
✓ 已验证
DOI
高影响因子
Nano Research
·
2021
·Vol. 14
·期 10
·3523-3530
·
IF 8.897
Ma Guangyao,Zhou Yanli,Wang Yingying,Feng Zhenyu,Yang Jian
Layer-structured MoS 2 is regarded as a promising anode material for potassium ion batteries. Herein, MoS 2 nanosheets on N, P-codoping reduced graphene oxide (MoS 2 /N, P-rGO) have been successfully prepared via a facile two-step synthesis, where few-layered MoS 2 nanosheets are chemically bonded onto the surface of N, P-rGO. As an anode material, MoS 2 /N, P-rGO exhibits a high specific capacity (462.7 mAh·g −1 at 100 mA·g −1 over 200 cycles), outstanding rate capability (224.9 mAh·g −1 at 20 A·g −1 ), and excellent cycle life (236.6 mAh·g −1 at 2 A·g −1 after 7,000 cycles), much better than those of MoS 2 and MoS 2 /rGO. These advanced performances outperform most of the reported anode materials for potassium ion batteries to date. Meanwhile, the K-storage reactions of MoS 2 /N, P-rGO have been disclosed through in-situ and ex-situ characterizations. The kinetics analysis confirms that K-storage of MoS 2 /N, P-rGO is predominant by pseudo-capacitance.
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Meng-Yuan Fu,Hao-Yu Wang,Hang-Ling Zhai,Qin-Yu Zhu,Jie Dai
Titanium oxides and bismuth halides or oxyhalides have been known to be excellent semiconductors with both excellent photocatalytic and photoelectric properties. The design of supersalts assembled by titanium-oxo clusters (TOCs) and bismuth iodide clusters is a hopeful strategy for exploring the chemistry and application of new titanium-oxo clusters. We report herein a series of unusual ionic TOCs with Ti12 oxo cluster cations and bismuth iodide anions, [Ti12O15(OiPr)17]3[Bi3I12] (Bi3), [Ti12O14(OiPr)18][Bi4I14(THF)2] (Bi4), and [Ti12O14(OiPr)18][Ti11BiO14(OiPr)17][Bi6I22] (Bi6). Single-crystal X-ray analysis revealed that the type and charge of the Ti12 clusters varied with the charges of different bismuth iodide clusters. Taking advantage of the easy hydrolysis of the TOCs and BiI clusters in water, we used these supersalt crystals as single-source precursors to prepare a p–n-type BiOI-TiO photocatalyst. The heterojunction materials were carefully characterized by powder X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, etc. The synergistic effect of the two components of BiOI and TiO on the photocatalytic degradation of RhB in water is demonstrated. This is a very convenient method for obtaining a p–n-type BiOI-TiO heterojuction photocatalyst by just placing the ground TOC crystals into water.
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Dengqi Zhou,Ke Zeng,Liqiang Wang,Feiying Tang
The development of highly efficient non-noble metal catalysts for the hydrogenation of N-heteroarenes under mild condition is of great importance for both theoretical and industrial applications, which can efficiently reduce energy consumption and environmental pollution. In this work, we found that the prepared CoCu nano-alloy catalyst after exposed in the air over 24 h (named Co 1 Cu 1 /C) exhibited a dramatically improved catalytic performance (yield from trace to >99%) for quinoline hydrogenation under mild reaction conditions (60 °C, 3 MPa H 2 ). According to the characterization, the catalyst Co 1 Cu 1 /C exhibited the strong interaction between Co and Cu. Meanwhile, it was endowed with a stable partial oxidation surface. The unsaturated oxygen coordinated surface of Co 1 Cu 1 /C presented a moderate binding for quinoline and 1, 2, 3, 4-tetrahydroquinoline, which could efficiently avoid the deactivation of catalyst and favor the hydrogenation kinetics. The density functional theory (DFT) calculations coupled with X ray-based structural analyses suggested that the unsaturated oxygen coordinated surface could lower the diffusion energy of the active hydrogen species and the reaction barrier for quinoline hydrogenation which resulted from the d - p orbital electron coupling. This work revealed that the catalytic performance of nano-alloy catalysts might not only be ascribed to the interaction between metals, while the unsaturated oxygen coordination of metallic surfaces played an important role.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Tinglei Liu,Chen Ding,Kejing Gao,Jingsheng Zhou,Wei-Guang Yang,Shuai Zhou,Yuxuan Lin,Hao-Yu Zhao,Zhong-Zhen Yu,Dongzhi Yang
High filtration loss of the oil-based drilling fluids restricts their application in reservoirs production at high temperature and high pressure. In this work, modified nano-microsphere P(AM-co-AA)/PSt filtration reducers are designed to reduce filtration loss by excellent dispersion in oil medium, excellent water-absorption swelling and auxiliary emulsification and prepared by inverse phase emulsion polymerization using acrylamide, acrylic acid and styrene, followed by modification with stearyl trimethyl ammonium chloride. The modified nano-microspheres absorb water to reach an equilibrium swelling rate of 950%. Additionally, the water contact angle increases to 70.3° and the temperature resistance reaches up to 240 o C. The permeability of the filter cake can be decreased through the utilization of swelling microspheres to plug tiny cracks, as well as by intertwining organo-montmorillonite sheets with polymer chains detaching from weakly crosslinked microspheres. Especially, due to their excellent dispersion in the oil medium, the microspheres gather at the oil-water interface, thereby stabilizing the emulsification state of oil-based drilling fluids. These two points are conducive to reducing filtration loss. After thermal aging for 16 h at 180 o C, oil-based drilling fluid by adding 4% microspheres exhibits a low filtration loss volume of 7.8 mL at 180 o C and 3.5 MPa. These hydrophilic nano-microspheres with a partially alkylated structure have a considerable practical application prospect as filtration loss reducers of oil-based drilling fluids.
✓ 已验证
产品关联
DOI
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Jie Ding,Xiufen Liao,Wanhe Li,Xiangxuan Lin,Huayu Hu,Yanjuan Zhang,Tao Gan,Zuqiang Huang
Using biodegradable films as smart packaging to monitor the freshness of meat in real time is a promising and challenging work. Herein, the phosphorus-doped carbon dots (P-CDs) with pH sensitivity were coated on starch/polyvinyl alcohol film (SP film) by a simple scrape-coating method and applied to monitor the freshness of pork. The P-CDs@SP film exhibits a uniform surface, excellent mechanical properties, higher light blocking. When the total volatile base nitrogen (TVB-N) of pork exceeded 15 mg/100 g, the color of the film changed from brownish-yellow to purple-red, and the total color difference ( ΔE ) of the film obviously increased from 10.24 to 9.37 to 20.75 and 22.93 under the storage conditions of 25 and 4 °C, respectively. This can be attributed to the abundant hydroxyl groups on the surface of P-CDs and SP film to promote their stable binding through hydrogen bonds, which greatly improves the hydrophilicity of the films, providing conditions for the rapid conversion of the TVB-N to ammonia and the formation of an alkaline environment. This work can simply and effectively monitor the freshness of pork through the changes of film color, will provide a new idea for the preparation of biodegradable smart packaging materials.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）